<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script type="text/javascript" src="./js/ctx.js"></script>
</head>
<body>
<div id="cesiumContainer">
</div>
<div id="toolbar">
    <table><tbody>
    <tr>
        <td>Lens Flare</td>
        <td><input type="checkbox" data-bind="checked: show"></td>
    </tr>
    <tr>
        <td>Intensity</td>
        <td><input type="range" min="0" max="10" step="0.01" data-bind="value: intensity, valueUpdate: 'input'"></td>
    </tr>
    <tr>
        <td>Distortion</td>
        <td><input type="range" min="1" max="20" step="0.01" data-bind="value: distortion, valueUpdate: 'input'"></td>
    </tr>
    <tr>
        <td>Dispersion</td>
        <td><input type="range" min="0" max="1" step="0.01" data-bind="value: dispersion, valueUpdate: 'input'"></td>
    </tr>
    <tr>
        <td>Halo Width</td>
        <td><input type="range" min="0" max="1" step="0.01" data-bind="value: haloWidth, valueUpdate: 'input'"></td>
    </tr>
    </tbody></table>
</div>

<script>
    var initCesium = new InitCesium();
    var viewer = initCesium.initViewer('cesiumContainer');

    var viewModel = {
        show: true,
        intensity: 2.0,
        distortion: 10.0,
        dispersion: 0.4,
        haloWidth: 0.4
    };

    Cesium.knockout.track(viewModel);
    var toolbar = document.getElementById('toolbar');
    Cesium.knockout.applyBindings(viewModel, toolbar);
    for (var name in viewModel) {
        if (viewModel.hasOwnProperty(name)) {
            Cesium.knockout.getObservable(viewModel, name).subscribe(updatePostProcess);
        }
    }

    var lensFlare = viewer.scene.postProcessStages.add(Cesium.PostProcessStageLibrary.createLensFlareStage());

    function updatePostProcess() {
        lensFlare.enabled = Boolean(viewModel.show);
        lensFlare.uniforms.intensity = Number(viewModel.intensity);
        lensFlare.uniforms.distortion = Number(viewModel.distortion);
        lensFlare.uniforms.ghostDispersal = Number(viewModel.dispersion);
        lensFlare.uniforms.haloWidth = Number(viewModel.haloWidth);
        lensFlare.uniforms.earthRadius = Cesium.Ellipsoid.WGS84.maximumRadius;
    }
    updatePostProcess();

    var camera = viewer.scene.camera;
    camera.position = new Cesium.Cartesian3(40010447.97500168, 56238683.46406788, 20776576.752223067);
    camera.direction = new Cesium.Cartesian3(-0.5549701431494752, -0.7801872010801355, -0.2886452346452218);
    camera.up = new Cesium.Cartesian3(-0.3016252360948521, -0.13464820558887716, 0.9438707950150912);
    camera.right = Cesium.Cartesian3.cross(camera.direction, camera.up, new Cesium.Cartesian3());

    viewer.clock.currentTime = new Cesium.JulianDate(2458047, 27399.860215000022);

</script>
</body>
</html>